MESON Chess Problem Database

Problem Display
PID: 224738 (1BK5/7N/3R4/4Pk2/R3p3/6Pb/1Q6/6N1 w - - 0 1)

Ohlsson, Anders V

Wiener Hausfrauen-Zeitung, 1887

1BK5/7N/3R4/4Pk2/R3p3/6Pb/1Q6/6N1

#2

9 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bg4
      • 2.Rf6#
    • 1...e3
      • 2.Rf4#
      • 2.Rf6#
  • Tries
    • 1.Sxh3?
      • 1...e3
        • 2.Rf4#
        • 2.Rf6#
        • 2.g4#
      • 1...Kg4!
    • 1.Qc1?
      • threat
        • 2.Qf4#
        • 2.Qg5#
      • 1...Kg4
        • 2.Qg5#
      • 1...e3
        • 2.Rf6#
      • 1...Kxe5+!
    • 1.Qd2?
      • threat
        • 2.Qf4#
        • 2.Qg5#
      • 1...Kg4
        • 2.Qg5#
      • 1...e3
        • 2.Rf6#
      • 1...Kxe5+!
    • 1.Qe2?
      • threat
        • 2.Rf6#
        • 2.Qh5#
        • 2.Qxe4#
      • 1...Bg2
        • 2.Rf6#
        • 2.Qh5#
      • 1...Bg4
        • 2.Rf6#
        • 2.Qxe4#
      • 1...e3
        • 2.Rf6#
        • 2.Qh5#
      • 1...Kxe5+!
    • 1.Qf2+?
      • 1...Kg4
        • 2.Qf3#
      • 1...Kxe5+!
    • 1.Qb3?
      • threat
        • 2.Qe6#
      • 1...Kg4
        • 2.Qf3#
      • 1...Kxe5+!
  • Keys
    • 1.Qh2!
      • 1...Kxe5+
        • 2.g4#
      • 1...Kg4
        • 2.Qxh3#
      • 1...Bf1
        • 2.Qh5#
      • 1...Bg2
        • 2.Qh5#
      • 1...Bg4
        • 2.Rf6#
      • 1...e3
        • 2.Rf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK::R1(F)
  • Tries
    • Try
      • S(A);XB(a)
      • Refutation
        • K(c);P_SPINP(b),S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P_SPINP(b),S_FLIGHT::QAR1(B)
        • P(b);::R1(F)
      • Refutation
        • K(c);CHECK,P-FLIGHT,XP(E)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P_SPINP(b),S_FLIGHT::QAR1(B)
        • P(b);::R1(F)
      • Refutation
        • K(c);CHECK,P-FLIGHT,XP(E)
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Refutation
        • K(c);CHECK,P-FLIGHT,P_SPINP(b),XP(E)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);P_SPINP(b),S_FLIGHT::QAB1(B)
      • Refutation
        • K(c);CHECK,P-FLIGHT,XP(E)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(c);P_SPINP(b),S_FLIGHT::QAB1(B)
      • Refutation
        • K(c);CHECK,P-FLIGHT,XP(E)
  • Actual
    • Q(B);
    • Vars
      • K(c);CHECK,P-FLIGHT,XP(E)::QAB(B)+P(C)
      • K(c);P_SPINP(b),S_FLIGHT::QAB1(B),XB(a)
      • B(a);OGATE::QAR2(B)
      • B(a);SBLOCK::R1(F)
      • P(b);::R1(F)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).